motive和motivation的区别：含义不同、用法不同、侧重点不同。motive可做名词和形容词，含义为“动机”、“原因”、“导致运动的”，有一种贬义的意思；motivation只作名词，含义为“动力”、“诱因”，是指相对积极的情绪。
一、motive的中文意思及用法介绍
motive可作名词和形容词，译为动机;原因;目的；发动的;导致运动的。
例句：There seemed to be no motive for the murder.
这起谋杀案看不出有什么动机。
Police have ruled out robbery as a motive for the killing.
警方已排除因抢劫而杀人的可能。
I have an ulterior motive in offering to help you.
我主动提出要帮助你是有私心的。
The police have excluded theft as a motive for the murder.
警方已排除这起谋杀案中的偷窃动机。
She distrusted his motives for wanting to see her again.
她怀疑他想再见她一面是别有用心。
She has a natural ability to understand the motives of others
她有一种洞察他人动机的天赋。
People want to dissect his work and question his motives.
人们想仔细分析他的作品，并对他的动机提出质疑。
Their motive is money, and they will stop at nothing to get it.
他们的动机是钱，为了钱他们会不择手段。
二、motivation的中文意思及用法介绍
motivation作为可数名词，译为动机;动力;诱因。
例句：What is the motivation behind this sudden change?
这种突然转变背后的动机是什么？
The timing of the attack, and its motivations, are unknown.
袭击发生的时间及其动机尚不清楚。
He admitted a lack of motivation and a feeling of sloth.
他承认自己缺乏动力，总想犯懒。
Now a third and far more significant motivation presents itself.
目前又出现了支持这四个目标的第三个理由。
It doesn't have the motivation of the student.
学生也不会有积极性。
With high motivation and enthusiasm, we can keep on learning ．
高度的动力和热情可以让我们持续学习。
